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Spongy Brakes on 2022 Kona - Time for Brake Fluid Flush?

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Chris P. · rep 0 · May 22, 3:02 AM · 1 replies · solved · Question

Vehicle: 2022 Hyundai Kona Limited

Hey everyone, I've got a 2022 Hyundai Kona Limited with about 40,000 miles on it. Lately, the brake pedal feels a bit softer or 'spongier' than it used to, and I feel like I have to press it down further to get the same braking power. I haven't noticed any leaks, and the brake pads look okay.

Could this be a sign that I need a brake fluid flush? I know brake fluid absorbs moisture over time, but 40k miles seems a bit early to me. What are the typical recommendations for brake fluid flushes on these newer Hyundais? Is DOT 3 or DOT 4 fluid recommended?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:02 AM

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ClearTheCode admin answer:

A spongy brake pedal on your 2022 Hyundai Kona Limited at 40,000 miles is a concern that warrants immediate attention. While brake fluid degradation is a common cause, it's important to rule out other potential issues.

Here's what you should consider:

  1. Brake Fluid Degradation: Brake fluid is hygroscopic, meaning it absorbs moisture from the air over time. This moisture lowers the fluid's boiling point, which can lead to vapor bubbles forming in the brake lines under heavy braking, causing a spongy pedal. It also contributes to internal corrosion of brake components.
  2. Recommended Intervals: While 40,000 miles might seem early, many manufacturers, including Hyundai, recommend a brake fluid flush every 2-3 years or 30,000-45,000 miles, regardless of mileage, due to moisture absorption. Your vehicle is likely within this timeframe.
  3. Fluid Type: For your 2022 Kona, Hyundai typically specifies DOT 4 brake fluid. Always confirm this in your owner's manual. DOT 4 has a higher boiling point than DOT 3, which is beneficial for modern braking systems, especially those with ABS and stability control.
  4. Other Potential Causes: A spongy pedal can also indicate:
    • Air in the brake lines: This could happen after a brake service or if there's a small leak.
    • Failing master cylinder: The master cylinder is responsible for pressurizing the brake fluid. Internal leaks can cause a spongy pedal.
    • Worn brake lines: Swelling or deteriorating rubber brake lines can also affect pedal feel.

When to See a Shop: Given that braking is a critical safety system, it is highly recommended to have a professional inspect your vehicle immediately. They can:

  • Test the brake fluid for moisture content.
  • Inspect the entire brake system for leaks, worn components, or air in the lines.
  • Perform a proper brake fluid flush and bleed the system to ensure all air is removed and fresh fluid is circulating. Do not delay this inspection.
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